i say if there is any question about it in the long run and you aren't sure if your ready for a roller coaster ride, sinch up that belt and move on. i guaranteed if she wants it friends with bennefits style, she will take things a lot lighter than you by the sounds of it and then in the end you end up getting fucked, and not in the good way.
i say move on, forget about her for a while, do hoodrat things with your friends, even tho your 28, and take a load off. live the single life and say fuck bitches for a while. then if its meant to be, you will both come stammering back to each other in the end. if not you will find someone else and be like damn, idk why i even wasted my time with her.
but most importatntly you dont wanna be the one getting used then later in life say to yourself, well that was just a fucking waste of time and energy to get stamped on. trust me, i know from experience